Updated On September 23rd, 2025
Pet's info: Dog | Goldendoodle | Male | unneutered | 5 months and 17 days old | 13 lbs
Can I put my puppy on heartguard without a blood test? He is 5 months and 3 weeks old
1 Answer
Published on October 11th, 2018
Yes, I usually start dogs under six months on a heartworm medication without a blood test. The test checks for antibodies to adult worms and they need six months to grow into adults so that’s why the test isn’t needed. I’m glad you are using heart guard since it’s safe to use even if by some chance he has an early heartworm infection. Certainly have his blood tested at your annual exam and vaccinations. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Jac.
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